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Hello GUI!

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GuiHello is an application, which by examples, shows Gui library features for the creation of user interfaces. The source code is in folder /src/howto/guihello of the SDK distribution.


1. Hello Label!

Capture of Label type interface controls.
Figure 1: Label controls.
Listing 1: howto/guihello/labels.c
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/* Labels basics */
    
#include "labels.h"
#include "guiall.h"

/*---------------------------------------------------------------------------*/

static const char_t *i_LABEL_01 = "Hello.";
static const char_t *i_LABEL_02 = "Hello, I'm a Label.";
static const char_t *i_LABEL_03 = "Hello, I'm a Label, longer than first.";
static const char_t *i_LABEL_04 = "Hello, I'm a Label, longer than first and longer than second.";
static const char_t *i_LABEL_05 = "Hello, I'm a Label, longer than first, longer than second and longer than third.";
static const char_t *i_LABEL_06 = "Hello, I'm a Label, longer than first, longer than second, longer than third and longer than fourth.";
static const char_t *i_LABEL_07 = "Mouse sensitive label";

/*---------------------------------------------------------------------------*/

static void i_OnLayoutWidth(Layout *layout, Event *event)
{
    const EvButton *p = event_params(event, EvButton);
    real32_t width = 0;
    switch (p->index) {
    case 0:
        width = 0;
        break;
    case 1:
        width = 100;
        break;
    case 2:
        width = 200;
        break;
    case 3:
        width = 300;
        break;
    case 4:
        width = 400;
        break;
    cassert_default();
    }

    layout_hsize(layout, 0, width);
    layout_update(layout);
}

/*---------------------------------------------------------------------------*/

static PopUp *i_width_popup(Layout *layout)
{
    PopUp *popup = popup_create();
    popup_add_elem(popup, "Natural", NULL);
    popup_add_elem(popup, "100px", NULL);
    popup_add_elem(popup, "200px", NULL);
    popup_add_elem(popup, "300px", NULL);
    popup_add_elem(popup, "400px", NULL);
    popup_OnSelect(popup, listener(layout, i_OnLayoutWidth, Layout));
    return popup;
}

/*---------------------------------------------------------------------------*/

Panel *labels_single_line(void)
{
    Panel *panel = panel_create();
    Layout *layout = layout_create(1, 7);
    PopUp *popup = i_width_popup(layout);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Label *label6 = label_create();
    color_t c1 = gui_alt_color(color_rgb(192, 255, 255), color_rgb(48, 112, 112));
    color_t c2 = gui_alt_color(color_rgb(255, 192, 255), color_rgb(128, 48, 112));
    color_t c3 = gui_alt_color(color_rgb(255, 255, 192), color_rgb(112, 112, 48));
    label_text(label1, i_LABEL_01);
    label_text(label2, i_LABEL_02);
    label_text(label3, i_LABEL_03);
    label_text(label4, i_LABEL_04);
    label_text(label5, i_LABEL_05);
    label_text(label6, i_LABEL_06);
    label_bgcolor(label1, c1);
    label_bgcolor(label2, c2);
    label_bgcolor(label3, c3);
    label_bgcolor(label4, c1);
    label_bgcolor(label5, c2);
    label_bgcolor(label6, c3);
    layout_popup(layout, popup, 0, 0);
    layout_label(layout, label1, 0, 1);
    layout_label(layout, label2, 0, 2);
    layout_label(layout, label3, 0, 3);
    layout_label(layout, label4, 0, 4);
    layout_label(layout, label5, 0, 5);
    layout_label(layout, label6, 0, 6);
    layout_vmargin(layout, 0, 5);
    panel_layout(panel, layout);
    return panel;
}

/*---------------------------------------------------------------------------*/

Panel *labels_multi_line(void)
{
    Panel *panel = panel_create();
    Layout *layout = layout_create(1, 7);
    PopUp *popup = i_width_popup(layout);
    Label *label1 = label_multiline();
    Label *label2 = label_multiline();
    Label *label3 = label_multiline();
    Label *label4 = label_multiline();
    Label *label5 = label_multiline();
    Label *label6 = label_multiline();
    color_t c1 = gui_alt_color(color_rgb(192, 255, 255), color_rgb(48, 112, 112));
    color_t c2 = gui_alt_color(color_rgb(255, 192, 255), color_rgb(128, 48, 112));
    color_t c3 = gui_alt_color(color_rgb(255, 255, 192), color_rgb(112, 112, 48));
    label_text(label1, i_LABEL_01);
    label_text(label2, i_LABEL_02);
    label_text(label3, i_LABEL_03);
    label_text(label4, i_LABEL_04);
    label_text(label5, i_LABEL_05);
    label_text(label6, i_LABEL_06);
    label_bgcolor(label1, c1);
    label_bgcolor(label2, c2);
    label_bgcolor(label3, c3);
    label_bgcolor(label4, c1);
    label_bgcolor(label5, c2);
    label_bgcolor(label6, c3);
    label_align(label4, ekLEFT);
    label_align(label5, ekCENTER);
    label_align(label6, ekRIGHT);
    layout_popup(layout, popup, 0, 0);
    layout_label(layout, label1, 0, 1);
    layout_label(layout, label2, 0, 2);
    layout_label(layout, label3, 0, 3);
    layout_label(layout, label4, 0, 4);
    layout_label(layout, label5, 0, 5);
    layout_label(layout, label6, 0, 6);
    layout_vmargin(layout, 0, 5);
    panel_layout(panel, layout);
    return panel;
}

/*---------------------------------------------------------------------------*/

Panel *labels_mouse_over(void)
{
    Panel *panel = panel_create();
    Layout *layout = layout_create(1, 5);
    Font *font = font_system(20, ekFNORMAL | ekFPIXELS);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    label_text(label1, i_LABEL_07);
    label_text(label2, i_LABEL_07);
    label_text(label3, i_LABEL_07);
    label_text(label4, i_LABEL_07);
    label_text(label5, i_LABEL_07);
    label_font(label1, font);
    label_font(label2, font);
    label_font(label3, font);
    label_font(label4, font);
    label_font(label5, font);
    label_color_over(label1, kCOLOR_RED);
    label_color_over(label2, kCOLOR_RED);
    label_color_over(label3, kCOLOR_RED);
    label_color_over(label4, kCOLOR_RED);
    label_color_over(label5, kCOLOR_RED);
    label_style_over(label1, ekFBOLD);
    label_style_over(label2, ekFITALIC);
    label_style_over(label3, ekFSTRIKEOUT);
    label_style_over(label4, ekFUNDERLINE);
    label_bgcolor_over(label5, kCOLOR_CYAN);
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 2);
    layout_label(layout, label4, 0, 3);
    layout_label(layout, label5, 0, 4);
    panel_layout(panel, layout);
    font_destroy(&font);
    return panel;
}


2. Hello Button!

Capture of Button type interface controls.
Figure 2: Button controls.
Listing 2: howto/guihello/buttons.c
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/* Buttons demo */

#include "buttons.h"
#include "res.h"
#include "guiall.h"

/*---------------------------------------------------------------------------*/

static Layout *i_flatbuttons(void)
{
    Layout *layout = layout_create(6, 1);
    Button *button1 = button_flat();
    Button *button2 = button_flat();
    Button *button3 = button_flat();
    Button *button4 = button_flat();
    Button *button5 = button_flat();
    Button *button6 = button_flat();
    button_text(button1, "Open File");
    button_text(button2, "Save File");
    button_text(button3, "Search File");
    button_text(button4, "Edit File");
    button_text(button5, "Add File");
    button_text(button6, "Delete File");
    button_image(button1, (const Image*)FOLDER24_PNG);
    button_image(button2, (const Image*)DISK24_PNG);
    button_image(button3, (const Image*)SEARCH24_PNG);
    button_image(button4, (const Image*)EDIT24_PNG);
    button_image(button5, (const Image*)PLUS24_PNG);
    button_image(button6, (const Image*)ERROR24_PNG);
    layout_button(layout, button1, 0, 0);
    layout_button(layout, button2, 1, 0);
    layout_button(layout, button3, 2, 0);
    layout_button(layout, button4, 3, 0);
    layout_button(layout, button5, 4, 0);
    layout_button(layout, button6, 5, 0);
    return layout;
} 

/*---------------------------------------------------------------------------*/

static Layout *i_radios(void)
{
    Layout *layout = layout_create(1, 4);
    Button *radio1 = button_radio();
    Button *radio2 = button_radio();
    Button *radio3 = button_radio();
    Button *radio4 = button_radio();
    button_text(radio1, "Wireframe");
    button_text(radio2, "Shaded");
    button_text(radio3, "Realistic");
    button_text(radio4, "V-Ray");
    button_state(radio1, ekON);
    layout_button(layout, radio1, 0, 0);
    layout_button(layout, radio2, 0, 1);
    layout_button(layout, radio3, 0, 2);
    layout_button(layout, radio4, 0, 3);
    layout_margin(layout, 5);
    layout_vmargin(layout, 0, 3);
    layout_vmargin(layout, 1, 3);
    layout_vmargin(layout, 2, 3);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_checks(void)
{
    Layout *layout = layout_create(1, 4);
    Button *check1 = button_check();
    Button *check2 = button_check();
    Button *check3 = button_check();
    Button *check4 = button_check();
    button_text(check1, "Lines");
    button_text(check2, "Meshes");
    button_text(check3, "Materials");
    button_text(check4, "Lights");
    button_state(check1, ekON);
    button_state(check2, ekOFF);
    button_state(check3, ekOFF);
    button_state(check4, ekON);
    layout_button(layout, check1, 0, 0);
    layout_button(layout, check2, 0, 1);
    layout_button(layout, check3, 0, 2);
    layout_button(layout, check4, 0, 3);
    layout_margin(layout, 5);
    layout_vmargin(layout, 0, 3);
    layout_vmargin(layout, 1, 3);
    layout_vmargin(layout, 2, 3);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_pushes(void)
{
    Layout *layout = layout_create(4, 1);
    Button *button1 = button_push();
    Button *button2 = button_push();
    Button *button3 = button_push();
    button_text(button1, "Retry");
    button_text(button2, "Cancel");
    button_text(button3, "Ok");
    button_image(button1, (const Image*)RETRY_PNG);
    layout_button(layout, button1, 0, 0);
    layout_button(layout, button2, 2, 0);
    layout_button(layout, button3, 3, 0);
    layout_hmargin(layout, 2, 5);
    layout_hexpand(layout, 1);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_buttons(void)
{
    Layout *layout = layout_create(1, 3);
    Layout *layout1 = i_flatbuttons();
    Layout *layout2 = layout_create(2, 2);
    Layout *layout3 = i_radios();
    Layout *layout4 = i_checks();
    Layout *layout5 = i_pushes();
    Button *check1 = button_check();
    Button *check2 = button_check3();
    button_text(check1, "Enable 3D Render");
    button_text(check2, "Enable Preview Settings");
    button_state(check1, ekON);
    button_state(check2, ekMIXED);
    layout_layout(layout, layout1, 0, 0);
    layout_button(layout2, check1, 0, 0);
    layout_layout(layout2, layout3, 0, 1);
    layout_button(layout2, check2, 1, 0);
    layout_layout(layout2, layout4, 1, 1);
    layout_layout(layout, layout2, 0, 1);
    layout_layout(layout, layout5, 0, 2);
    layout_halign(layout, 0, 0, ekLEFT);
    layout_margin(layout2, 5);
    layout_hmargin(layout2, 0, 10);
    layout_margin(layout5, 5);
    return layout;
}

/*---------------------------------------------------------------------------*/

Panel *buttons_basics(void)
{
    Layout *layout = i_buttons();
    Panel *panel = panel_create();
    panel_layout(panel, layout);
    return panel;
}


3. Hello PopUp and Combo!

Capture of PopUp type interface controls.
Figure 3: PopUp controls.
Capture of Combo type interface controls.
Figure 4: Combo controls.
Listing 3: howto/guihello/popcom.c
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/* PopUp and Combo */

#include "popcom.h"
#include "guiall.h"
#include "res.h"

/*---------------------------------------------------------------------------*/

static void i_popups(Layout *layout)
{ 
    Label *label1 = label_create();
    Label *label2 = label_create();
    PopUp *popup1 = popup_create();
    PopUp *popup2 = popup_create();
    label_text(label1, "Language:");
    label_text(label2, "Color:");
    popup_add_elem(popup1, "English", (const Image*)UKING_PNG);
    popup_add_elem(popup1, "Español", (const Image*)SPAIN_PNG);
    popup_add_elem(popup1, "Portugues", (const Image*)PORTUGAL_PNG);
    popup_add_elem(popup1, "Italiana", (const Image*)ITALY_PNG);
    popup_add_elem(popup1, "Tiếng Việt", (const Image*)VIETNAM_PNG);
    popup_add_elem(popup1, "России", (const Image*)RUSSIA_PNG);
    popup_add_elem(popup1, "日本語", (const Image*)JAPAN_PNG);
    popup_add_elem(popup2, "Red", (const Image*)RED_PNG);
    popup_add_elem(popup2, "Blue", (const Image*)BLUE_PNG);
    popup_add_elem(popup2, "Green", (const Image*)GREEN_PNG);
    popup_add_elem(popup2, "Yellow", (const Image*)YELLOW_PNG);
    popup_add_elem(popup2, "Black", (const Image*)BLACK_PNG);
    popup_add_elem(popup2, "White", (const Image*)WHITE_PNG);
    popup_list_height(popup1, 10);
    popup_list_height(popup2, 10);
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_popup(layout, popup1, 1, 0);
    layout_popup(layout, popup2, 1, 1);
}

/*---------------------------------------------------------------------------*/

static void i_combos(Layout *layout)
{
    Label *label1 = label_create();
    Label *label2 = label_create();
    Combo *combo1 = combo_create();
    Combo *combo2 = combo_create();
    label_text(label1, "Search:");
    label_text(label2, "Folder:");
    combo_add_elem(combo1, "Search", NULL);
    combo_add_elem(combo1, "Disk", NULL);
    combo_add_elem(combo1, "Edit", NULL);
    combo_add_elem(combo2, "/home/fran/Desktop", NULL);
    combo_add_elem(combo2, "/usr/include", NULL);
    combo_add_elem(combo2, "/mnt/volume1", NULL);
    combo_add_elem(combo2, "/etc/html/log.txt", NULL);
    layout_label(layout, label1, 2, 0);
    layout_label(layout, label2, 2, 1);
    layout_combo(layout, combo1, 3, 0);
    layout_combo(layout, combo2, 3, 1);
}

/*---------------------------------------------------------------------------*/

Panel *popup_combo(void)
{
    Panel *panel = panel_create();
    Layout *layout = layout_create(4, 2);
    i_popups(layout);
    i_combos(layout);
    layout_margin(layout, 10.f);
    layout_vmargin(layout, 0, 10.f);
    layout_hmargin(layout, 0, 5.f);
    layout_hmargin(layout, 1, 10.f);
    layout_hmargin(layout, 2, 5.f);
    layout_hsize(layout, 1, 150.f);
    layout_hsize(layout, 3, 150.f);
    panel_layout(panel, layout);
    return panel;
}

4. Hello Edit and UpDown!

Capture of Edit and UpDown type interface controls.
Figure 5: Edit and UpDown controls.
Listing 4: howto/guihello/form.c
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/* Form demo */

#include "form.h"
#include "res.h"
#include "guiall.h"

/*---------------------------------------------------------------------------*/

static void i_OnFilter(void *noused, Event *e)
{
    const EvText *params = event_params(e, EvText);
    EvTextFilter *result = event_result(e, EvTextFilter);
    uint32_t i = 0, j = 0;
    while (params->text[i] != '\0')
    {
        if (params->text[i] >= '0' && params->text[i] <= '9')
        {
            result->text[j] = params->text[i];
            j += 1;
        }

        i += 1;
    }

    result->text[j] = '\0';
    result->apply = TRUE;
    unref(noused);
}

/*---------------------------------------------------------------------------*/

static void i_OnUpDown(Edit *edit, Event *e)
{
    const EvButton *params = event_params(e, EvButton);
    int32_t n = str_to_i32(edit_get_text(edit), 10, NULL);
    char_t text[64];
    n += (params->index == 0) ? 1 : -1;
    bstd_sprintf(text, sizeof(text), "%d", n);
    edit_text(edit, text);
}

/*---------------------------------------------------------------------------*/

static Layout *i_numbers(color_t colorbg)
{
    Layout *layout = layout_create(5, 1);
    Label *label = label_create();
    Edit *edit1 = edit_create();
    Edit *edit2 = edit_create();
    UpDown *updown1 = updown_create();
    UpDown *updown2 = updown_create();
    label_text(label, "Height (cm):");
    edit_text(edit1, "25");
    edit_text(edit2, "175");
    edit_align(edit1, ekRIGHT);
    edit_align(edit2, ekRIGHT);
    edit_OnFilter(edit1, listener(NULL, i_OnFilter, void));
    edit_OnFilter(edit2, listener(NULL, i_OnFilter, void));
    edit_bgcolor_focus(edit1, colorbg);
    edit_bgcolor_focus(edit2, colorbg);
    updown_OnClick(updown1, listener(edit1, i_OnUpDown, Edit));
    updown_OnClick(updown2, listener(edit2, i_OnUpDown, Edit));
    updown_tooltip(updown1, "Increase/Decrease age");
    updown_tooltip(updown2, "Increase/Decrease height");
    layout_label(layout, label, 2, 0);
    layout_edit(layout, edit1, 0, 0);
    layout_edit(layout, edit2, 3, 0);
    layout_updown(layout, updown1, 1, 0);
    layout_updown(layout, updown2, 4, 0);
    layout_hmargin(layout, 1, 10.f);
    layout_hmargin(layout, 2, 10.f);
    layout_hexpand2(layout, 0, 3, .5f);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_edits(void)
{
    color_t colorbg = gui_alt_color(color_bgr(0xFFFFe4), color_bgr(0x101010));
    Layout *layout1 = layout_create(2, 6);
    Layout *layout2 = i_numbers(colorbg);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Label *label6 = label_create();
    Edit *edit1 = edit_create();
    Edit *edit2 = edit_create();
    Edit *edit3 = edit_create();
    Edit *edit4 = edit_create();
    Edit *edit5 = edit_create();
    label_text(label1, "User Name:");
    label_text(label2, "Password:");
    label_text(label3, "Address:");
    label_text(label4, "City:");
    label_text(label5, "Phone:");
    label_text(label6, "Age:");
    label_color_over(label1, color_rgb(255, 128, 52));
    label_color_over(label2, color_rgb(70, 129, 207));
    label_color_over(label3, color_rgb(119, 188, 31));
    label_style_over(label4, ekFITALIC | ekFUNDERLINE);
    edit_text(edit1, "Amanda Callister");
    edit_text(edit2, "aQwe56nhjJk");
    edit_text(edit3, "35, Tuam Road");
    edit_text(edit4, "Galway - Ireland");
    edit_text(edit5, "+35 654 333 000");
    edit_passmode(edit2, TRUE);
    edit_bgcolor_focus(edit1, colorbg);
    edit_bgcolor_focus(edit2, colorbg);
    edit_bgcolor_focus(edit3, colorbg);
    edit_bgcolor_focus(edit4, colorbg);
    edit_bgcolor_focus(edit5, colorbg);
    layout_label(layout1, label1, 0, 0);
    layout_label(layout1, label2, 0, 1);
    layout_label(layout1, label3, 0, 2);
    layout_label(layout1, label4, 0, 3);
    layout_label(layout1, label5, 0, 4);
    layout_label(layout1, label6, 0, 5);
    layout_edit(layout1, edit1, 1, 0);
    layout_edit(layout1, edit2, 1, 1);
    layout_edit(layout1, edit3, 1, 2);
    layout_edit(layout1, edit4, 1, 3);
    layout_edit(layout1, edit5, 1, 4);
    layout_layout(layout1, layout2, 1, 5);
    layout_hmargin(layout1, 0, 5);
    layout_hexpand(layout1, 1);
    layout_vmargin(layout1, 0, 5);
    layout_vmargin(layout1, 1, 5);
    layout_vmargin(layout1, 2, 5);
    layout_vmargin(layout1, 3, 5);
    layout_vmargin(layout1, 4, 5);
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_form(void)
{
    Layout *layout1 = layout_create(1, 2);
    Layout *layout2 = i_edits();
    Label *label = label_multiline();
    label_text(label, "Please fill in all the information on the form. We will use this data to send commercial mail at all hours, not caring much if it bothers you or not.");
    label_color(label, gui_alt_color(color_rgb(255, 0, 0), color_rgb(180, 180, 180)));
    label_bgcolor(label, gui_alt_color(color_rgb(216, 191, 216), color_rgb(80, 40, 40)));
    label_bgcolor_over(label, gui_alt_color(color_rgb(255, 250, 205), color_rgb(105, 100, 55)));
    label_style_over(label, ekFUNDERLINE);
    layout_layout(layout1, layout2, 0, 0);
    layout_label(layout1, label, 0, 1);
    layout_hsize(layout1, 0, 300);
    layout_vmargin(layout1, 0, 10);
    layout_margin(layout1, 10);
    return layout1;
}

/*---------------------------------------------------------------------------*/

Panel *form_basic(void)
{
    Layout *layout = i_form();
    Panel *panel = panel_create();
    panel_layout(panel, layout);
    return panel;
}


5. Hello ListBox!

Capture of ListBox-like interface controls.
Figure 6: ListBox controls.
Listing 5: howto/guihello/listboxes.c
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/* Listboxes */
    
#include "listboxes.h"
#include "guiall.h"
#include "res.h"

/*---------------------------------------------------------------------------*/

static ListBox *i_full_listbox(void)
{
    ListBox *listbox = listbox_create();
    listbox_size(listbox, s2df(150, 200));
    listbox_multisel(listbox, TRUE);
    listbox_checkbox(listbox, TRUE);
    listbox_add_elem(listbox, "Sales presentation", resid_image(POWERPOINT_PNG));
    listbox_add_elem(listbox, "Balance 2017", resid_image(POWERPOINT_PNG));
    listbox_add_elem(listbox, "The Last of Us Analysis", resid_image(POWERPOINT_PNG));
    listbox_add_elem(listbox, "Phone list", resid_image(ACCESS_PNG));
    listbox_add_elem(listbox, "Customer database", resid_image(ACCESS_PNG));
    listbox_add_elem(listbox, "My first book", resid_image(WORD_PNG));
    listbox_add_elem(listbox, "Letter to April", resid_image(WORD_PNG));
    listbox_add_elem(listbox, "Cookbook Recipes", resid_image(WORD_PNG));
    listbox_add_elem(listbox, "Dog playing piano", resid_image(JPG_PNG));
    listbox_add_elem(listbox, "Hollidays 2019", resid_image(JPG_PNG));
    listbox_add_elem(listbox, "Amanda's party", resid_image(JPG_PNG));
    listbox_add_elem(listbox, "Flying", resid_image(JPG_PNG));
    listbox_add_elem(listbox, "The C Programing Language", resid_image(PDF_PNG));
    listbox_add_elem(listbox, "Graphics Programing with GDI+", resid_image(PDF_PNG));
    listbox_add_elem(listbox, "Personal finances", resid_image(EXCEL_PNG));
    listbox_add_elem(listbox, "Stocks 2017", resid_image(EXCEL_PNG));
    listbox_add_elem(listbox, "Website Dashboard", resid_image(EXCEL_PNG));
    listbox_add_elem(listbox, "Open Issues", resid_image(DOCUMENT_PNG));
    listbox_add_elem(listbox, "TODO List", resid_image(DOCUMENT_PNG));
    listbox_select(listbox, 0, TRUE);
    return listbox;
}

/*---------------------------------------------------------------------------*/

static ListBox *i_image_listbox(void)
{
    ListBox *listbox = listbox_create();
    listbox_size(listbox, s2df(150, 200));
    listbox_add_elem(listbox, "Spain", resid_image(SPAIN_PNG));
    listbox_add_elem(listbox, "Italy", resid_image(ITALY_PNG));
    listbox_add_elem(listbox, "United Kingdom", resid_image(UKING_PNG));
    listbox_add_elem(listbox, "Vietnam", resid_image(VIETNAM_PNG));
    listbox_add_elem(listbox, "Russia", resid_image(RUSSIA_PNG));
    listbox_add_elem(listbox, "Portugal", resid_image(PORTUGAL_PNG));
    listbox_add_elem(listbox, "Japan", resid_image(JAPAN_PNG));
    listbox_add_elem(listbox, "Disk", resid_image(DISK16_PNG));
    listbox_add_elem(listbox, "Edit", resid_image(EDIT16_PNG));
    listbox_add_elem(listbox, "Folder", resid_image(FOLDER16_PNG));
    listbox_add_elem(listbox, "Restore", resid_image(RESTORE16_PNG));
    listbox_add_elem(listbox, "Search", resid_image(SEARCH16_PNG));
    listbox_add_elem(listbox, "Error", resid_image(ERROR16_PNG));
    listbox_select(listbox, 0, TRUE);
    return listbox;
}

/*---------------------------------------------------------------------------*/

static ListBox *i_simple_listbox(void)
{
    ListBox *listbox = listbox_create();
    listbox_size(listbox, s2df(150, 200));
    listbox_add_elem(listbox, "Item 1", NULL);
    listbox_add_elem(listbox, "Item 2", NULL);
    listbox_add_elem(listbox, "Item 3", NULL);
    listbox_add_elem(listbox, "Item 4", NULL);
    //listbox_add_elem(listbox, "Item 5", NULL);
    //listbox_add_elem(listbox, "Item 6", NULL);
    //listbox_add_elem(listbox, "Item 7", NULL);
    //listbox_add_elem(listbox, "Item 8", NULL);
    //listbox_add_elem(listbox, "Item 9", NULL);
    //listbox_add_elem(listbox, "Item 10", NULL);
    //listbox_add_elem(listbox, "Item 11", NULL);
    //listbox_add_elem(listbox, "Item 12", NULL);
    //listbox_add_elem(listbox, "Item 13", NULL);
    //listbox_add_elem(listbox, "Item 14", NULL);
    //listbox_add_elem(listbox, "Item 15", NULL);
    //listbox_add_elem(listbox, "Item 16", NULL);
    //listbox_add_elem(listbox, "Item 17", NULL);
    //listbox_add_elem(listbox, "Item 18", NULL);
    //listbox_add_elem(listbox, "Item 19", NULL);
    //listbox_add_elem(listbox, "Item 20", NULL);
    listbox_select(listbox, 0, TRUE);
    return listbox;
}

/*---------------------------------------------------------------------------*/

Panel *listboxes(void)
{
    Panel *panel = panel_create();
    Layout *layout = layout_create(3, 2);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    ListBox *listbox1 = i_simple_listbox();
    ListBox *listbox2 = i_image_listbox();
    ListBox *listbox3 = i_full_listbox();
    label_text(label1, "Simple ListBox");
    label_text(label2, "With Images");
    label_text(label3, "Checks and Multiselect");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 1, 0);
    layout_label(layout, label3, 2, 0);
    layout_listbox(layout, listbox1, 0, 1);
    layout_listbox(layout, listbox2, 1, 1);
    layout_listbox(layout, listbox3, 2, 1);
    layout_hmargin(layout, 0, 10);
    layout_hmargin(layout, 1, 10);
    layout_vmargin(layout, 0, 5);
    panel_layout(panel, layout);
    return panel;
}

6. Hello Slider and Progress!

Capture of Slider and Progress type interface controls.
Figure 7: Slider and Progress controls.
Listing 6: howto/guihello/sliders.c
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/* Sliders */

#include "sliders.h"
#include "guiall.h"

/*---------------------------------------------------------------------------*/

static void i_OnSlider(Progress *prog, Event *event)
{
    const EvSlider *params = event_params(event, EvSlider);
    progress_value(prog, params->pos);
}

/*---------------------------------------------------------------------------*/

Panel *sliders(void)
{
    Layout *layout1 = layout_create(2, 1);
    Layout *layout2 = layout_create(1, 8);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Slider *slider1 = slider_create();
    Slider *slider2 = slider_create();
    Slider *slider3 = slider_vertical();
    Progress *prog1 = progress_create();
    Progress *prog2 = progress_create();
    Panel *panel = panel_create();
    label_text(label1, "Slider");
    label_text(label2, "Slider (discrete 6 steps)");
    label_text(label3, "Progress Bar");
    label_text(label4, "Progress Undefined");
    slider_steps(slider2, 6);
    slider_tooltip(slider1, "Horizontal Slider");
    slider_tooltip(slider2, "Horizontal Discrete Slider");
    slider_tooltip(slider3, "Vertical Slider");
    slider_OnMoved(slider1, listener(prog1, i_OnSlider, Progress));
    progress_undefined(prog2, TRUE);
    layout_label(layout2, label1, 0, 0);
    layout_label(layout2, label2, 0, 2);
    layout_label(layout2, label3, 0, 4);
    layout_label(layout2, label4, 0, 6);
    layout_slider(layout2, slider1, 0, 1);
    layout_slider(layout2, slider2, 0, 3);
    layout_slider(layout1, slider3, 1, 0);
    layout_progress(layout2, prog1, 0, 5);
    layout_progress(layout2, prog2, 0, 7);
    layout_hsize(layout2, 0, 300);
    layout_layout(layout1, layout2, 0, 0);
    layout_vmargin(layout2, 0, 5);
    layout_vmargin(layout2, 1, 5);
    layout_vmargin(layout2, 2, 5);
    layout_vmargin(layout2, 3, 5);
    layout_vmargin(layout2, 4, 5);
    layout_vmargin(layout2, 5, 5);
    layout_vmargin(layout2, 6, 5);
    layout_hmargin(layout1, 0, 10);
    panel_layout(panel, layout1);
    return panel;
}

7. Hello TextView!

Rich text view from an RTF file.
Figure 8: Rich text control.
Listing 7: howto/guihello/textviews.c
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/* Use of textviews */

#include "textviews.h"
#include "guiall.h"
#include "res.h"

/*---------------------------------------------------------------------------*/

static void i_set_rtf(TextView *text)
{
    ResPack *pack = res_respack("");
    uint32_t size = 0;
    const byte_t *data = respack_file(pack, TEXTVIEW_RTF, &size);
    Stream *stm = stm_from_block(data, size);
    textview_rtf(text, stm);
    stm_close(&stm);
    respack_destroy(&pack);
}

/*---------------------------------------------------------------------------*/

static void i_set_hard_coding(TextView *text)
{
    textview_units(text, ekFPOINTS);
    textview_lspacing(text, 1.15f);
    textview_afspace(text, 10);
    textview_family(text, "Arial");
    textview_fsize(text, 16);
    textview_writef(text, "What is Lorem Ipsum?\n");
    textview_fsize(text, 11);
    textview_writef(text, "Lorem Ipsum ");
    textview_fstyle(text, ekFBOLD);
    textview_writef(text, "is simply");
    textview_fstyle(text, ekFNORMAL);
    textview_writef(text, " dummy text of the ");
    textview_fstyle(text, ekFITALIC);
    textview_writef(text, "printing and typesetting ");
    textview_fstyle(text, ekFNORMAL);
    textview_writef(text, "industry. ");
    textview_fsize(text, 16);
    textview_color(text, color_rgb(255, 0, 0));
    textview_writef(text, "Lorem Ipsum ");
    textview_color(text, kCOLOR_DEFAULT);
    textview_fsize(text, 11);
    textview_writef(text, "has been the ");
    textview_family(text, "Courier New");
    textview_fsize(text, 14);
    textview_writef(text, "[industry's standard] ");
    textview_family(text, "Arial");
    textview_fsize(text, 11);
    textview_fstyle(text, ekFUNDERLINE);
    textview_writef(text, "dummy text");
    textview_fstyle(text, ekFNORMAL);
    textview_writef(text, " ever ");
    textview_fstyle(text, ekFSTRIKEOUT);
    textview_writef(text, "since the 1500s");
    textview_fstyle(text, ekFNORMAL);
    textview_writef(text, ", when an ");
    textview_color(text, color_rgb(0, 176, 80));
    textview_writef(text, "unknown printer ");
    textview_color(text, kCOLOR_DEFAULT);
    textview_writef(text, "took a galley of type and scrambled it to make a type specimen book");
    textview_fstyle(text, ekFITALIC);
    textview_color(text, color_rgb(0, 77, 187));
    textview_bgcolor(text, color_rgb(192, 192, 192));
    textview_writef(text, ". It has survived not only five centuries");
    textview_fstyle(text, ekFNORMAL);
    textview_color(text, kCOLOR_DEFAULT);
    textview_bgcolor(text, kCOLOR_DEFAULT);
    textview_writef(text, ", but also the leap into electronic typesetting, remaining essentially unchanged.");
}

/*---------------------------------------------------------------------------*/

Panel *textviews(void)
{
    Layout *layout = layout_create(1, 4);
    Label *label1 = label_create();
    Label *label2 = label_create();
    TextView *text1 = textview_create();
    TextView *text2 = textview_create();
    Panel *panel = panel_create();
    label_text(label1, "From RTF data");
    label_text(label2, "Hard coding");
    textview_size(text1, s2df(450, 250));
    textview_size(text2, s2df(450, 250));
    i_set_rtf(text1);
    i_set_hard_coding(text2);
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 2);
    layout_textview(layout, text1, 0, 1);
    layout_textview(layout, text2, 0, 3);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 1, 10);
    layout_vmargin(layout, 2, 5);
    panel_layout(panel, layout);
    return panel;
}

8. Hello SplitView!

Multiple SplitViews in the same window.
Figure 9: SplitView.
Listing 8: howto/guihello/splits.c
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/* Use of splitviews */

#include "splits.h"
#include "guiall.h"

static const char_t *i_LOREM = "Lorem Ipsum is simply dummy text of the printing and typesetting industry. Lorem Ipsum has been the industry's standard dummy text ever since the 1500s, when an unknown printer took a galley of type and scrambled it to make a type specimen book. It has survived not only five centuries, but also the leap into electronic typesetting, remaining essentially unchanged. It was popularised in the 1960s with the release of Letraset sheets containing Lorem Ipsum passages, and more recently with desktop publishing software like Aldus PageMaker including versions of Lorem Ipsum.";

/*---------------------------------------------------------------------------*/

static void i_OnDraw(View *view, Event *e)
{
    const EvDraw *p = event_params(e, EvDraw);
    real32_t p0 = p->width / 6;
    real32_t p1 = p->height / 6;
    real32_t p2 = p->width / 3;
    real32_t p3 = p->height / 3;
    unref(view);
    draw_fill_color(p->ctx, kCOLOR_RED);
    draw_rect(p->ctx, ekFILL, 0, 0, p->width, p->height);
    draw_fill_color(p->ctx, kCOLOR_GREEN);
    draw_rect(p->ctx, ekFILL, p0, p1, p->width - 2 * p0, p->height - 2 * p1);
    draw_fill_color(p->ctx, kCOLOR_BLUE);
    draw_rect(p->ctx, ekFILL, p2, p3, p->width - 2 * p2, p->height - 2 * p3);
}

/*---------------------------------------------------------------------------*/

static Panel *i_left_panel(void)
{
    uint32_t i, n = 32;
    Panel *panel = panel_scroll(FALSE, TRUE);
    Layout *layout = layout_create(2, n);
    real32_t rmargin = panel_scroll_width(panel);

    for (i = 0; i < n; ++i)
    {
        char_t text[64];
        Label *label = label_create();
        Edit *edit = edit_create();
        bstd_sprintf(text, sizeof(text), "Value %02d", i);
        label_text(label, text);
        bstd_sprintf(text, sizeof(text), "Edit here value %02d", i);
        edit_text(edit, text);
        layout_label(layout, label, 0, i);
        layout_edit(layout, edit, 1, i);
    }

    for (i = 0; i < n - 1; ++i)
        layout_vmargin(layout, i, 3);

    layout_hmargin(layout, 0, 5);
    layout_margin4(layout, 0, rmargin + 5, 0, 0);
    layout_hexpand(layout, 1);
    panel_layout(panel, layout);
    return panel;
}

/*---------------------------------------------------------------------------*/

Panel *split_panel(void)
{
    Panel *panel1 = panel_create();
    Panel *panel2 = i_left_panel();
    Layout *layout = layout_create(1, 1);
    SplitView *split1 = splitview_vertical();
    SplitView *split2 = splitview_horizontal();
    TextView *text = textview_create();
    View *view = view_create();
    textview_writef(text, i_LOREM);
    view_OnDraw(view, listener(view, i_OnDraw, View));
    splitview_pos(split1, .25f);
    splitview_size(split1, s2df(800, 480));
    splitview_size(split2, s2df(640, 480));
    splitview_view(split2, view);
    splitview_text(split2, text);
    splitview_panel(split1, panel2);
    splitview_split(split1, split2);
    layout_splitview(layout, split1, 0, 0);
    panel_layout(panel1, layout);
    return panel1;
}

9. Hello Gui Binding!

Data binding in Windows.
Figure 10: Gui Data binding.
Listing 9: howto/guihello/guibind.c
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/* GUI data binding */

#include "guibind.h"
#include "guiall.h"

typedef struct _basictypes_t BasicTypes;

typedef enum _myenum_t
{
    ekRED,
    ekBLUE,
    ekGREEN,
    ekBLACK,
    ekMAGENTA,
    ekCYAN,
    ekYELLOW,
    ekWHITE
} myenum_t;

struct _basictypes_t
{
    bool_t bool_val;
    uint16_t uint16_val;
    real32_t real32_val;
    myenum_t enum_val;
    state_t enum3_val;
    String* str_val;
};

#define i_NUM_CONTROLS 9

/*---------------------------------------------------------------------------*/

static void i_destroy_data(BasicTypes **data)
{
    str_destroy(&(*data)->str_val);
    heap_delete(data, BasicTypes);
}

/*---------------------------------------------------------------------------*/

static Layout *i_radio_layout(void)
{
    uint32_t i = 0, n = 6;
    Layout *layout = layout_create(1, n);
    for (i = 0; i < n; ++i)
    {
        Button *radio = button_radio();
        char_t str[64];
        bstd_sprintf(str, sizeof(str), "Radio %d", i + 1);
        button_text(radio, str);
        layout_button(layout, radio, 0, i);
    }

    return layout;
}

/*---------------------------------------------------------------------------*/

static void i_title_labels(Layout* layout)
{
    Font* font = font_system(font_regular_size(), ekFBOLD);
    const char_t* strs[] = { "Label", "EditBox", "Check", "Check3", "Radio", "PopUp", "ListBox", "Slider", "UpDown" };
    uint32_t i = 0;
    for (i = 0; i < i_NUM_CONTROLS; ++i)
    {
        Label* label = label_create();
        label_text(label, strs[i]);
        label_font(label, font);
        layout_label(layout, label, 0, i);
    }

    layout_hmargin(layout, 0, 10);
    font_destroy(&font);
}

/*---------------------------------------------------------------------------*/

static void i_value_labels(Layout* layout)
{
    uint32_t i = 0;
    for (i = 0; i < i_NUM_CONTROLS; ++i)
    {
        Label* label = label_create();
        label_align(label, ekCENTER);
        layout_label(layout, label, 2, i);
        layout_halign(layout, 2, i, ekJUSTIFY);
    }

    layout_hsize(layout, 2, 80);
    layout_hmargin(layout, 0, 10);
    for (i = 0; i < i_NUM_CONTROLS - 1; ++i)
        layout_vmargin(layout, i, 5);

    cell_dbind(layout_cell(layout, 2, 0), BasicTypes, String*, str_val);
    cell_dbind(layout_cell(layout, 2, 1), BasicTypes, String*, str_val);
    cell_dbind(layout_cell(layout, 2, 2), BasicTypes, bool_t, bool_val);
    cell_dbind(layout_cell(layout, 2, 3), BasicTypes, state_t, enum3_val);
    cell_dbind(layout_cell(layout, 2, 4), BasicTypes, uint16_t, uint16_val);
    cell_dbind(layout_cell(layout, 2, 5), BasicTypes, myenum_t, enum_val);
    cell_dbind(layout_cell(layout, 2, 6), BasicTypes, myenum_t, enum_val);
    cell_dbind(layout_cell(layout, 2, 7), BasicTypes, real32_t, real32_val);
    cell_dbind(layout_cell(layout, 2, 8), BasicTypes, real32_t, real32_val);
}

/*---------------------------------------------------------------------------*/

static Layout *i_layout(void)
{
    Layout *layout = layout_create(3, 9);
    Label *label = label_create();
    Edit *edit = edit_create();
    Button *check = button_check();
    Button *check3 = button_check3();
    Layout *radios = i_radio_layout();
    PopUp *popup = popup_create();
    ListBox *listbox = listbox_create();
    Slider *slider = slider_create();
    UpDown *updown = updown_create();
    layout_label(layout, label, 1, 0);
    layout_edit(layout, edit, 1, 1);
    layout_button(layout, check, 1, 2);
    layout_button(layout, check3, 1, 3);
    layout_layout(layout, radios, 1, 4);
    layout_popup(layout, popup, 1, 5);
    layout_listbox(layout, listbox, 1, 6);
    layout_slider(layout, slider, 1, 7);
    layout_updown(layout, updown, 1, 8);
    layout_halign(layout, 1, 0, ekJUSTIFY);
    layout_halign(layout, 1, 8, ekLEFT);
    cell_dbind(layout_cell(layout, 1, 0), BasicTypes, String*, str_val);
    cell_dbind(layout_cell(layout, 1, 1), BasicTypes, String*, str_val);
    cell_dbind(layout_cell(layout, 1, 2), BasicTypes, bool_t, bool_val);
    cell_dbind(layout_cell(layout, 1, 3), BasicTypes, state_t, enum3_val);
    cell_dbind(layout_cell(layout, 1, 4), BasicTypes, uint16_t, uint16_val);
    cell_dbind(layout_cell(layout, 1, 5), BasicTypes, myenum_t, enum_val);
    cell_dbind(layout_cell(layout, 1, 6), BasicTypes, myenum_t, enum_val);
    cell_dbind(layout_cell(layout, 1, 7), BasicTypes, real32_t, real32_val);
    cell_dbind(layout_cell(layout, 1, 8), BasicTypes, real32_t, real32_val);
    i_title_labels(layout);
    i_value_labels(layout);
    return layout;
}

/*---------------------------------------------------------------------------*/

Panel* guibind(void)
{
    Layout *layout = NULL;
    Panel *panel = NULL;
    BasicTypes *data = heap_new(BasicTypes);
    data->bool_val = TRUE;
    data->uint16_val = 4;
    data->real32_val = 15.5f;
    data->enum3_val = ekMIXED;
    data->enum_val = ekCYAN;
    data->str_val = str_c("Text String");

    dbind_enum(state_t, ekOFF, "");
    dbind_enum(state_t, ekON, "");
    dbind_enum(state_t, ekMIXED, "");
    dbind_enum(myenum_t, ekRED, "Red");
    dbind_enum(myenum_t, ekBLUE, "Blue");
    dbind_enum(myenum_t, ekGREEN, "Green");
    dbind_enum(myenum_t, ekBLACK, "Black");
    dbind_enum(myenum_t, ekMAGENTA, "Magenta");
    dbind_enum(myenum_t, ekCYAN, "Cyan");
    dbind_enum(myenum_t, ekYELLOW, "Yellow");
    dbind_enum(myenum_t, ekWHITE, "While");
    dbind(BasicTypes, bool_t, bool_val);
    dbind(BasicTypes, uint16_t, uint16_val);
    dbind(BasicTypes, real32_t, real32_val);
    dbind(BasicTypes, state_t, enum3_val);
    dbind(BasicTypes, myenum_t, enum_val);
    dbind(BasicTypes, String*, str_val);
    dbind_range(BasicTypes, real32_t, real32_val, -50, 50);
    dbind_increment(BasicTypes, real32_t, real32_val, 5);

    layout = i_layout();
    panel = panel_create();
    layout_dbind(layout, NULL, BasicTypes);
    layout_dbind_obj(layout, data, BasicTypes);
    panel_data(panel, &data, i_destroy_data, BasicTypes);
    panel_layout(panel, layout);
    return panel;
}

10. Hello Struct Binding!

Struct data binding in Windows.
Figure 11: Gui Struct binding.
Listing 10: howto/guihello/layoutbind.c
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/* GUI data binding */

#include "guibind.h"
#include "guiall.h"

typedef struct _vector_t Vector;
typedef struct _structtypes_t StructTypes;

struct _vector_t
{
    real32_t x;
    real32_t y;
    real32_t z;
};

struct _structtypes_t
{
    String *name;
    Vector vec1;
    Vector vec2;
    Vector vec3;
    Vector *pvec1;
    Vector *pvec2;
    Vector *pvec3;
    real32_t length1;
    real32_t length2;
    real32_t length3;
    real32_t length4;
    real32_t length5;
    real32_t length6;
};

/*---------------------------------------------------------------------------*/

static void i_destroy_data(StructTypes **data)
{
    str_destroy(&(*data)->name);
    heap_delete(&(*data)->pvec1, Vector);
    heap_delete(&(*data)->pvec2, Vector);
    heap_delete(&(*data)->pvec3, Vector);
    heap_delete(data, StructTypes);
}

/*---------------------------------------------------------------------------*/

static Vector i_vec_init(const real32_t x, const real32_t y, const real32_t z)
{
    Vector v;
    v.x = x;
    v.y = y;
    v.z = z;
    return v;
}

/*---------------------------------------------------------------------------*/

static real32_t i_vec_length(const Vector *vec)
{
    real32_t n = vec->x * vec->x + vec->y * vec->y + vec->z * vec->z;
    return bmath_sqrtf(n);
}

/*---------------------------------------------------------------------------*/

static void i_OnDataChange(void *non_used, Event *e)
{
    StructTypes *data = evbind_object(e, StructTypes);
    Layout *layout = event_sender(e, Layout);
    unref(non_used);

    if (evbind_modify(e, StructTypes, Vector, vec1) == TRUE)
    {
        data->length1 = i_vec_length(&data->vec1);
        layout_dbind_update(layout, StructTypes, real32_t, length1);
    }
    else if (evbind_modify(e, StructTypes, Vector, vec2) == TRUE)
    {
        data->length2 = i_vec_length(&data->vec2);
        layout_dbind_update(layout, StructTypes, real32_t, length2);
    }
    else if (evbind_modify(e, StructTypes, Vector, vec3) == TRUE)
    {
        data->length3 = i_vec_length(&data->vec3);
        layout_dbind_update(layout, StructTypes, real32_t, length3);
    }
    else if (evbind_modify(e, StructTypes, Vector*, pvec1) == TRUE)
    {
        data->length4 = i_vec_length(data->pvec1);
        layout_dbind_update(layout, StructTypes, real32_t, length4);
    }
    else if (evbind_modify(e, StructTypes, Vector*, pvec2) == TRUE)
    {
        data->length5 = i_vec_length(data->pvec2);
        layout_dbind_update(layout, StructTypes, real32_t, length5);
    }
    else if (evbind_modify(e, StructTypes, Vector*, pvec3) == TRUE)
    {
        data->length6 = i_vec_length(data->pvec3);
        layout_dbind_update(layout, StructTypes, real32_t, length6);
    }
}

/*---------------------------------------------------------------------------*/

static Layout *i_vector_layout(void)
{
    Layout *layout = layout_create(3, 3);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Edit *edit1 = edit_create();
    Edit *edit2 = edit_create();
    Edit *edit3 = edit_create();
    UpDown *updown1 = updown_create();
    UpDown *updown2 = updown_create();
    UpDown *updown3 = updown_create();
    label_text(label1, "X:");
    label_text(label2, "Y:");
    label_text(label3, "Z:");
    edit_align(edit1, ekRIGHT);
    edit_align(edit2, ekRIGHT);
    edit_align(edit3, ekRIGHT);
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 2);
    layout_edit(layout, edit1, 1, 0);
    layout_edit(layout, edit2, 1, 1);
    layout_edit(layout, edit3, 1, 2);
    layout_updown(layout, updown1, 2, 0);
    layout_updown(layout, updown2, 2, 1);
    layout_updown(layout, updown3, 2, 2);
    layout_hmargin(layout, 0, 5);
    layout_vmargin(layout, 0, 5);
    layout_vmargin(layout, 1, 5);
    layout_hsize(layout, 1, 60);
    cell_dbind(layout_cell(layout, 1, 0), Vector, real32_t, x);
    cell_dbind(layout_cell(layout, 1, 1), Vector, real32_t, y);
    cell_dbind(layout_cell(layout, 1, 2), Vector, real32_t, z);
    cell_dbind(layout_cell(layout, 2, 0), Vector, real32_t, x);
    cell_dbind(layout_cell(layout, 2, 1), Vector, real32_t, y);
    cell_dbind(layout_cell(layout, 2, 2), Vector, real32_t, z);
    layout_dbind(layout, NULL, Vector);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_name_layout(void)
{
    Layout *layout = layout_create(2, 1);
    Label *label = label_create();
    Edit *edit = edit_create();
    label_text(label, "Object Name:");
    layout_hexpand(layout, 1);
    layout_label(layout, label, 0, 0);
    layout_edit(layout, edit, 1, 0);
    layout_hmargin(layout, 0, 10);
    cell_dbind(layout_cell(layout, 1, 0), StructTypes, String*, name);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_vectors_layout(void)
{
    Layout *layout1 = layout_create(3, 4);
    Layout *layout2 = i_vector_layout();
    Layout *layout3 = i_vector_layout();
    Layout *layout4 = i_vector_layout();
    Layout *layout5 = i_vector_layout();
    Layout *layout6 = i_vector_layout();
    Layout *layout7 = i_vector_layout();
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Label *label6 = label_create();
    label_text(label1, "vec1");
    label_text(label2, "vec2");
    label_text(label3, "vec3");
    label_text(label4, "*pvec1");
    label_text(label5, "*pvec2");
    label_text(label6, "*pvec3");
    layout_label(layout1, label1, 0, 0);
    layout_label(layout1, label2, 1, 0);
    layout_label(layout1, label3, 2, 0);
    layout_label(layout1, label4, 0, 2);
    layout_label(layout1, label5, 1, 2);
    layout_label(layout1, label6, 2, 2);
    layout_layout(layout1, layout2, 0, 1);
    layout_layout(layout1, layout3, 1, 1);
    layout_layout(layout1, layout4, 2, 1);
    layout_layout(layout1, layout5, 0, 3);
    layout_layout(layout1, layout6, 1, 3);
    layout_layout(layout1, layout7, 2, 3);
    layout_halign(layout1, 0, 0, ekCENTER);
    layout_halign(layout1, 1, 0, ekCENTER);
    layout_halign(layout1, 2, 0, ekCENTER);
    layout_halign(layout1, 0, 2, ekCENTER);
    layout_halign(layout1, 1, 2, ekCENTER);
    layout_halign(layout1, 2, 2, ekCENTER);
    layout_hmargin(layout1, 0, 10);
    layout_hmargin(layout1, 1, 10);
    layout_vmargin(layout1, 0, 5);
    layout_vmargin(layout1, 1, 10);
    layout_vmargin(layout1, 2, 5);
    cell_dbind(layout_cell(layout1, 0, 1), StructTypes, Vector, vec1);
    cell_dbind(layout_cell(layout1, 1, 1), StructTypes, Vector, vec2);
    cell_dbind(layout_cell(layout1, 2, 1), StructTypes, Vector, vec3);
    cell_dbind(layout_cell(layout1, 0, 3), StructTypes, Vector*, pvec1);
    cell_dbind(layout_cell(layout1, 1, 3), StructTypes, Vector*, pvec2);
    cell_dbind(layout_cell(layout1, 2, 3), StructTypes, Vector*, pvec3);
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_lengths_layout(void)
{
    Layout *layout = layout_create(2, 6);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Label *label6 = label_create();
    Label *label7 = label_create();
    Label *label8 = label_create();
    Label *label9 = label_create();
    Label *label10 = label_create();
    Label *label11 = label_create();
    Label *label12 = label_create();
    label_text(label1, "length1:");
    label_text(label2, "length2:");
    label_text(label3, "length3:");
    label_text(label4, "length4:");
    label_text(label5, "length5:");
    label_text(label6, "length6:");
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 0, 1);
    layout_label(layout, label3, 0, 2);
    layout_label(layout, label4, 0, 3);
    layout_label(layout, label5, 0, 4);
    layout_label(layout, label6, 0, 5);
    layout_label(layout, label7, 1, 0);
    layout_label(layout, label8, 1, 1);
    layout_label(layout, label9, 1, 2);
    layout_label(layout, label10, 1, 3);
    layout_label(layout, label11, 1, 4);
    layout_label(layout, label12, 1, 5);
    label_align(label7, ekRIGHT);
    label_align(label8, ekRIGHT);
    label_align(label9, ekRIGHT);
    label_align(label10, ekRIGHT);
    label_align(label11, ekRIGHT);
    label_align(label12, ekRIGHT);
    layout_hsize(layout, 1, 40);
    layout_hmargin(layout, 0, 5);
    layout_halign(layout, 1, 0, ekJUSTIFY);
    layout_halign(layout, 1, 1, ekJUSTIFY);
    layout_halign(layout, 1, 2, ekJUSTIFY);
    layout_halign(layout, 1, 3, ekJUSTIFY);
    layout_halign(layout, 1, 4, ekJUSTIFY);
    layout_halign(layout, 1, 5, ekJUSTIFY);
    cell_dbind(layout_cell(layout, 1, 0), StructTypes, real32_t, length1);
    cell_dbind(layout_cell(layout, 1, 1), StructTypes, real32_t, length2);
    cell_dbind(layout_cell(layout, 1, 2), StructTypes, real32_t, length3);
    cell_dbind(layout_cell(layout, 1, 3), StructTypes, real32_t, length4);
    cell_dbind(layout_cell(layout, 1, 4), StructTypes, real32_t, length5);
    cell_dbind(layout_cell(layout, 1, 5), StructTypes, real32_t, length6);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_layout(void)
{
    Layout *layout1 = layout_create(2, 2);
    Layout *layout2 = i_name_layout();
    Layout *layout3 = i_vectors_layout();
    Layout *layout4 = i_lengths_layout();
    layout_layout(layout1, layout2, 0, 0);
    layout_layout(layout1, layout3, 0, 1);
    layout_layout(layout1, layout4, 1, 1);
    layout_hmargin(layout1, 0, 10);
    layout_vmargin(layout1, 0, 10);
    return layout1;
}

/*---------------------------------------------------------------------------*/

Panel* layoutbind(void)
{
    Layout *layout = NULL;
    Panel *panel = NULL;
    StructTypes *data = heap_new(StructTypes);
    data->name = str_c("Generic Object");
    data->pvec1 = heap_new(Vector);
    data->pvec2 = heap_new(Vector);
    data->pvec3 = heap_new(Vector);
    data->vec1 = i_vec_init(1.2f, 2.1f, -3.4f);
    data->vec2 = i_vec_init(-0.2f, 1.8f, 2.3f);
    data->vec3 = i_vec_init(-3.2f, 4.9f, -4.7f);
    *data->pvec1 = i_vec_init(0.9f, 7.9f, -2.0f);
    *data->pvec2 = i_vec_init(-6.9f, 2.2f, 8.6f);
    *data->pvec3 = i_vec_init(3.9f, -5.5f, 0.3f);
    data->length1 = i_vec_length(&data->vec1);
    data->length2 = i_vec_length(&data->vec2);
    data->length3 = i_vec_length(&data->vec3);
    data->length4 = i_vec_length(data->pvec1);
    data->length5 = i_vec_length(data->pvec2);
    data->length6 = i_vec_length(data->pvec3);

    dbind(Vector, real32_t, x);
    dbind(Vector, real32_t, y);
    dbind(Vector, real32_t, z);
    dbind(StructTypes, String*, name);
    dbind(StructTypes, Vector, vec1);
    dbind(StructTypes, Vector, vec2);
    dbind(StructTypes, Vector, vec3);
    dbind(StructTypes, Vector*, pvec1);
    dbind(StructTypes, Vector*, pvec2);
    dbind(StructTypes, Vector*, pvec3);
    dbind(StructTypes, real32_t, length1);
    dbind(StructTypes, real32_t, length2);
    dbind(StructTypes, real32_t, length3);
    dbind(StructTypes, real32_t, length4);
    dbind(StructTypes, real32_t, length5);
    dbind(StructTypes, real32_t, length6);
    dbind_range(Vector, real32_t, x, -5, 5);
    dbind_range(Vector, real32_t, y, -5, 5);
    dbind_range(Vector, real32_t, z, -5, 5);
    dbind_increment(Vector, real32_t, x, .1f);
    dbind_increment(Vector, real32_t, y, .1f);
    dbind_increment(Vector, real32_t, z, .1f);

    layout = i_layout();
    panel = panel_create();
    layout_dbind(layout, listener(NULL, i_OnDataChange, void), StructTypes);
    layout_dbind_obj(layout, data, StructTypes);
    panel_data(panel, &data, i_destroy_data, StructTypes);
    panel_layout(panel, layout);
    return panel;
}

11. Hello Sublayout!

Interface window with several controls.
Figure 12: Sublayout composition.
Listing 11: howto/guihello/sublayout.c
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/* Sublayouts */
    
#include "sublayout.h"
#include "guiall.h"

/*---------------------------------------------------------------------------*/

static Layout *i_updown_layout(void)
{
    Layout *layout = layout_create(2, 1);
    Label *label = label_create();
    UpDown *updown = updown_create();
    label_text(label, "UpDown");
    layout_label(layout, label, 0, 0);
    layout_updown(layout, updown, 1, 0);
    layout_hexpand(layout, 0);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_left_grid_layout(void)
{
    Layout *layout1 = layout_create(2, 4);
    Layout *layout2 = i_updown_layout();
    Label *label = label_create();
    Button *button1 = button_push();
    Button *button2 = button_check();
    Slider *slider = slider_create();
    PopUp *popup = popup_create();
    Edit *edit = edit_create();
    Progress *progress = progress_create();
    label_text(label, "Hello!, I'm a label.");
    button_text(button1, "Push Button");
    button_text(button2, "Check Button");
    popup_add_elem(popup, "Option 1", NULL);
    popup_add_elem(popup, "Option 2", NULL);
    popup_add_elem(popup, "Option 3", NULL);
    popup_add_elem(popup, "Option 4", NULL);
    progress_undefined(progress, TRUE);
    layout_label(layout1, label, 0, 0);
    layout_button(layout1, button1, 0, 1);
    layout_button(layout1, button2, 0, 2);
    layout_slider(layout1, slider, 0, 3);
    layout_popup(layout1, popup, 1, 0);
    layout_edit(layout1, edit, 1, 1);
    layout_layout(layout1, layout2, 1, 2);
    layout_progress(layout1, progress, 1, 3);
    layout_hsize(layout1, 0, 150);
    layout_hsize(layout1, 1, 150);
    layout_hmargin(layout1, 0, 5);
    layout_vmargin(layout1, 0, 5);
    layout_vmargin(layout1, 1, 5);
    layout_vmargin(layout1, 2, 5);
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_left_layout(void)
{
    Layout *layout1 = layout_create(1, 2);
    Layout *layout2 = i_left_grid_layout();
    Button *button = button_push();
    button_text(button, "Clear");
    layout_layout(layout1, layout2, 0, 0);
    layout_button(layout1, button, 0, 1);
    layout_vmargin(layout1, 0, 5);
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_top_layout(void)
{
    Layout *layout1 = layout_create(2, 1);
    Layout *layout2 = i_left_layout();
    TextView *view = textview_create();
    layout_layout(layout1, layout2, 0, 0);
    layout_textview(layout1, view, 1, 0);
    layout_hsize(layout1, 1, 230);
    layout_hmargin(layout1, 0, 5);
    return layout1;
}

/*---------------------------------------------------------------------------*/

static Layout *i_bottom_layout(void)
{
    Layout *layout = layout_create(6, 1);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Label *label6 = label_create();
    label_text(label1, "Select 1");
    label_text(label2, "Select 2");
    label_text(label3, "Select 3");
    label_text(label4, "Select 4");
    label_text(label5, "Select 5");
    label_text(label6, "Select 6");
    label_style_over(label1, ekFUNDERLINE);
    label_style_over(label2, ekFUNDERLINE);
    label_style_over(label3, ekFUNDERLINE);
    label_style_over(label4, ekFUNDERLINE);
    label_style_over(label5, ekFUNDERLINE);
    label_style_over(label6, ekFUNDERLINE);
    layout_label(layout, label1, 0, 0);
    layout_label(layout, label2, 1, 0);
    layout_label(layout, label3, 2, 0);
    layout_label(layout, label4, 3, 0);
    layout_label(layout, label5, 4, 0);
    layout_label(layout, label6, 5, 0);
    return layout;
}

/*---------------------------------------------------------------------------*/

static Layout *i_main_layout(void)
{
    Layout *layout1 = layout_create(1, 2);
    Layout *layout2 = i_top_layout();
    Layout *layout3 = i_bottom_layout();
    layout_layout(layout1, layout2, 0, 0);
    layout_layout(layout1, layout3, 0, 1);
    layout_margin(layout1, 5);
    layout_vmargin(layout1, 0, 5);
    return layout1;
}

/*---------------------------------------------------------------------------*/

Panel *sublayouts(void)
{
    Panel *panel = panel_create();
    Layout *layout = i_main_layout();
    panel_layout(panel, layout);
    return panel;
}

12. Hello Subpanel!

Interface window with several controls.
Figure 13: Subpanels.
Listing 12: howto/guihello/subpanel.c
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/* Use of subpanels */

#include "subpanel.h"
#include "guiall.h"

/*---------------------------------------------------------------------------*/

Panel *subpanels(void)
{
    Panel *panel1 = panel_create();
    Panel *panel2 = panel_create();
    Layout *layout1 = layout_create(2, 2);
    Layout *layout2 = layout_create(2, 2);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Button *button = button_push();
    Slider *slider = slider_create();
    Edit *edit = edit_create();
    label_text(label1, "Main Panel");
    label_text(label2, "Subpanel");
    button_text(button, "Push Button");
    edit_text(edit, "EditBox");

    layout_label(layout2, label2, 0, 0);
    layout_button(layout2, button, 0, 1);
    layout_slider(layout2, slider, 1, 1);
    layout_hsize(layout2, 1, 150);
    layout_hmargin(layout2, 0, 10);
    layout_vmargin(layout2, 0, 10);
    layout_margin4(layout2, 5, 10, 10, 10);
    layout_skcolor(layout2, gui_label_color());
    panel_layout(panel2, layout2);

    layout_label(layout1, label1, 0, 0);
    layout_edit(layout1, edit, 1, 1);
    layout_panel(layout1, panel2, 0, 1);
    layout_hsize(layout1, 1, 100);
    layout_hmargin(layout1, 0, 10);
    layout_vmargin(layout1, 0, 10);
    layout_margin4(layout1, 5, 10, 10, 10);
    panel_layout(panel1, layout1);
    return panel1;
}

13. Hello Multi-layout!

Two different compositions for the same controls.
Figure 14: Panel with two layouts.
Listing 13: howto/guihello/multilayout.c
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/* Panels with multiple layouts */
    
#include "multilayout.h"
#include "guiall.h"

/*---------------------------------------------------------------------------*/

static Panel *i_multilayout_panel(void)
{
    Panel *panel = panel_create();
    Layout *layout1 = layout_create(2, 5);
    Layout *layout2 = layout_create(1, 10);
    Label *label1 = label_create();
    Label *label2 = label_create();
    Label *label3 = label_create();
    Label *label4 = label_create();
    Label *label5 = label_create();
    Edit *edit1 = edit_create();
    Edit *edit2 = edit_create();
    Edit *edit3 = edit_create();
    Edit *edit4 = edit_create();
    Edit *edit5 = edit_create();
    label_text(label1, "User Name:");
    label_text(label2, "Password:");
    label_text(label3, "Address:");
    label_text(label4, "City:");
    label_text(label5, "Phone:");
    edit_text(edit1, "Amanda Callister");
    edit_text(edit2, "aQwe56nhjJk");
    edit_text(edit3, "35, Tuam Road");
    edit_text(edit4, "Galway - Ireland");
    edit_text(edit5, "+35 654 333 000");
    edit_passmode(edit2, TRUE);

    layout_label(layout1, label1, 0, 0);
    layout_label(layout1, label2, 0, 1);
    layout_label(layout1, label3, 0, 2);
    layout_label(layout1, label4, 0, 3);
    layout_label(layout1, label5, 0, 4);
    layout_edit(layout1, edit1, 1, 0);
    layout_edit(layout1, edit2, 1, 1);
    layout_edit(layout1, edit3, 1, 2);
    layout_edit(layout1, edit4, 1, 3);
    layout_edit(layout1, edit5, 1, 4);
    layout_hsize(layout1, 1, 300);
    layout_hmargin(layout1, 0, 5);
    layout_vmargin(layout1, 0, 5);
    layout_vmargin(layout1, 1, 5);
    layout_vmargin(layout1, 2, 5);
    layout_vmargin(layout1, 3, 5);

    layout_label(layout2, label1, 0, 0);
    layout_label(layout2, label2, 0, 2);
    layout_label(layout2, label3, 0, 4);
    layout_label(layout2, label4, 0, 6);
    layout_label(layout2, label5, 0, 8);
    layout_edit(layout2, edit1, 0, 1);
    layout_edit(layout2, edit2, 0, 3);
    layout_edit(layout2, edit3, 0, 5);
    layout_edit(layout2, edit4, 0, 7);
    layout_edit(layout2, edit5, 0, 9);
    layout_hsize(layout2, 0, 200);
    layout_vmargin(layout2, 1, 5);
    layout_vmargin(layout2, 3, 5);
    layout_vmargin(layout2, 5, 5);
    layout_vmargin(layout2, 7, 5);

    panel_layout(panel, layout1);
    panel_layout(panel, layout2);
    return panel;
}

/*---------------------------------------------------------------------------*/

static void i_OnLayout(Panel *panel, Event *e)
{
    const EvButton *params = event_params(e, EvButton);
    panel_visible_layout(panel, params->index);
    panel_update(panel);
}

/*---------------------------------------------------------------------------*/

Panel *multilayouts(void)
{
    Panel *panel1 = panel_create();
    Panel *panel2 = i_multilayout_panel();
    Button *button1 = button_radio();
    Button *button2 = button_radio();
    Layout *layout1 = layout_create(1, 2);
    Layout *layout2 = layout_create(2, 1);
    button_text(button1, "Layout1");
    button_text(button2, "Layout2");
    button_state(button1, ekON);
    button_OnClick(button1, listener(panel2, i_OnLayout, Panel));
    layout_button(layout2, button1, 0, 0);
    layout_button(layout2, button2, 1, 0);
    layout_layout(layout1, layout2, 0, 0);
    layout_panel(layout1, panel2, 0, 1);
    layout_vmargin(layout1, 0, 10);
    layout_hmargin(layout2, 0, 10);
    layout_halign(layout1, 0, 0, ekLEFT);
    panel_layout(panel1, layout1);
    return panel1;
}

14. Hello Scroll-Panel!

Panel with a very large area and scroll bars.
Figure 15: Panel with scroll bars.
Listing 14: howto/guihello/scrollpanel.c
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/* Panel with scroll */
    
#include "scrollpanel.h"
#include "guiall.h"

static const uint32_t i_ROWS = 100;

/*---------------------------------------------------------------------------*/

Panel *scrollpanel(void)
{
    Panel *panel = panel_scroll(FALSE, TRUE);
    Layout *layout = layout_create(3, i_ROWS);
    real32_t margin = panel_scroll_width(panel);
    uint32_t i = 0;
    panel_size(panel, s2df(-1, 400));
    for (i = 0; i < i_ROWS; ++i)
    {
        char_t text[128];
        Label *label = label_create();
        Edit *edit = edit_create();
        Button *button = button_push();
        bstd_sprintf(text, sizeof(text), "User %d", i + 1);
        label_text(label, text);
        bstd_sprintf(text, sizeof(text), "Name of User %d", i + 1);
        edit_text(edit, text);
        bstd_sprintf(text, sizeof(text), "Edit %d", i + 1);
        button_text(button, text);
        layout_label(layout, label, 0, i);
        layout_edit(layout, edit, 1, i);
        layout_button(layout, button, 2, i);
    }

    for (i = 0; i < i_ROWS - 1; ++i)
        layout_vmargin(layout, i, 5);

    layout_hmargin(layout, 0, 10);
    layout_hmargin(layout, 1, 10);
    layout_hsize(layout, 1, 150);
    layout_margin4(layout, 0, margin, 0, 0);
    panel_layout(panel, layout);
    return panel;
}
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